US2660607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making 2-hydroxyethylhydrazine
Assignee: Eaton Laboratories Inc
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Filing: 1951-10-11
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Granted: 1953-11-24
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Expires: 1971-10-11
Abstract
No abstract record available.
Inventors
- 👤 Gever Gabriel
- 👤 Charles J O'keefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:22
CPC Classifications
C; C07; C07C; C07C243/00; C07C243/10; C07C243/12; C07C241/00; C07C241/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE PROCESS OF MAKING 2-HYDROXYETHYLHYDRAZINE, WHICH COMPRISES REACTING ETHYLENE OXIDE WITH HYDRAZINE HYDRATE IN A CLOSED SYSTEM BY HEATING ABOUT 2 TO ABOUT 7 PARTS OF HYDRAZINE HYDRATE TO A TEMPERATURE WITHIN THE RANGE OF ABOUT 30* C. TO ABOUT 100 C., GRADUALLY ADDING 1 PART OF ETHYLENE OXIDE TO THE HYDRAZINE HYDRATE, AND MAINTAINING THE TEMPERATURE OF THE REACTION MIXTURE WITHIN SAID TEMPERATURE RANGE DURING SAID ADDITION.
Claim 2
Dependent Claim
68 words
THE PROCESS OF MAKING 2-HYDROXYETHYLHYDRAZINE, WHICH COMPRISES REACTING ETHYLENE OXIDE WITH HYDRAZINE HYDRATE IN A CLOSED SYSTEM BY HEATING ABOUT 2 TO ABOUT 7 PARTS OF HYDRAZINE HYDRATE TO A TEMPERATURE WITHIN THE RANGE OF ABOUT 30* C. TO ABOUT 100 C., GRADUALLY ADDING 1 PART OF ETHYLENE OXIDE TO THE HYDRAZINE HYDRATE, AND MAINTAINING THE TEMPERATURE OF THE REACTION MIXTURE WITHIN SAID TEMPERATURE RANGE DURING SAID ADDITION.
References Cited (Backward Citations)
US2371133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |